Comment 1 for bug 498110

it affects me too,

a connect without getting dns looks like this in /var/log/messages:

Dec 20 12:49:04 karlrt-laptop pppd[1426]: Plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so loaded.
Dec 20 12:49:04 karlrt-laptop pppd[1426]: pppd 2.4.5 started by root, uid 0
Dec 20 12:49:04 karlrt-laptop pppd[1426]: Using interface ppp0
Dec 20 12:49:04 karlrt-laptop pppd[1426]: Connect: ppp0 <--> /dev/ttyUSB0
Dec 20 12:49:04 karlrt-laptop pppd[1426]: CHAP authentication succeeded
Dec 20 12:49:04 karlrt-laptop pppd[1426]: CHAP authentication succeeded
Dec 20 12:49:04 karlrt-laptop kernel: [ 9041.125368] PPP BSD Compression module registered
Dec 20 12:49:04 karlrt-laptop kernel: [ 9041.158150] PPP Deflate Compression module registered
Dec 20 12:49:13 karlrt-laptop pppd[1426]: Could not determine remote IP address: defaulting to 10.64.64.XX
Dec 20 12:49:13 karlrt-laptop pppd[1426]: local IP address 77.117.XX.XX
Dec 20 12:49:13 karlrt-laptop pppd[1426]: remote IP address 10.64.XX.XX

while sometimes, about 1/4 of all the connectings, this happens and it get the dns:

Dec 20 12:51:55 karlrt-laptop pppd[5788]: Plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so loaded.
Dec 20 12:51:55 karlrt-laptop pppd[5788]: pppd 2.4.5 started by root, uid 0
Dec 20 12:51:55 karlrt-laptop pppd[5788]: Using interface ppp0
Dec 20 12:51:55 karlrt-laptop pppd[5788]: Connect: ppp0 <--> /dev/ttyUSB0
Dec 20 12:51:55 karlrt-laptop pppd[5788]: CHAP authentication succeeded
Dec 20 12:51:55 karlrt-laptop pppd[5788]: CHAP authentication succeeded
Dec 20 12:51:59 karlrt-laptop pppd[5788]: Could not determine remote IP address: defaulting to 10.64.XX.XX
Dec 20 12:51:59 karlrt-laptop pppd[5788]: local IP address 77.119.XX.XX
Dec 20 12:51:59 karlrt-laptop pppd[5788]: remote IP address 10.64.XX.XX
Dec 20 12:51:59 karlrt-laptop pppd[5788]: primary DNS address 213.94.XX.XX
Dec 20 12:51:59 karlrt-laptop pppd[5788]: secondary DNS address 213.94.XX.XX